Ethyl 3,9-dihydroxy-9-methyl-7-phenyl-7,8,10-trihydro-6H-dibenzo[b,d]pyran-6-one-8-carboxylate（C（23）H（22）O6,Mr = 394.42） has been synthesized and its structure was determined by ~1H and ^（13）C NMR,ESI-MS,eleme...Ethyl 3,9-dihydroxy-9-methyl-7-phenyl-7,8,10-trihydro-6H-dibenzo[b,d]pyran-6-one-8-carboxylate（C（23）H（22）O6,Mr = 394.42） has been synthesized and its structure was determined by ~1H and ^（13）C NMR,ESI-MS,elemental analysis,and X-ray single-crystal diffraction.The crystal belongs to the triclinic system,space group P1,with a = 8.8220（17）,b = 9.881（2）,c = 12.157（2） A,α= 90.488（3）,β= 102.664（4）,γ= 98.799（3）°,V= 1020.8（3） A^3,Z= 2,Dc = 1.342 g/cm^3,μ= 0.099mm^（-1）,F（000） = 436,R = 0.0615 and wR = 0.2501 for 2592 observed reflections with（I2σ（I））.In the crystal structure,the coumarin ring system is planar and the 3：4 fused cyclohexane ring adopts distorted half-chair conformation.Rich hydrogen bonding interactions are formed between compound 2 and lattice water molecules.These interactions assemble molecules of 2 into 2D layered networks in an AB stacking sequence.Its in vitro antiproliferative activities against three human cancer cell lines were evaluated by MTT assay.展开更多
Due tothe important and common problems in optimizing material processing under reduced or micro gravity, bubble dynamic behaviors under thus gravity condition attract more and more attentions.For that purpose,a pair ...Due tothe important and common problems in optimizing material processing under reduced or micro gravity, bubble dynamic behaviors under thus gravity condition attract more and more attentions.For that purpose,a pair of Maxwell-Helmholtz(M-H)coils is developed to obtain a constant magnetic force acting on ferrofluids to neutralize gravity in a certain volume,which provides a uniform gradient magnetic field as well as a magnetic fieldintensity that is big enough to reach the magnetization saturation of ferrofluids.Afterwards,a finite-element-method based numerical simulation of the M-H coils shows a 20mm×30mm zone for 90%gravity compensation exists.An initial experimentshows that gas bubble is well controlled in a closed Hele-Shaw filled with ferrofluid with the help of magnetic gravity compensation.展开更多
The parametric instability behavior of a liquid mercury sessile drop under high frequency Amplitude-Modulate Magnetic Field(AMMF),i.e.a high frequency magnetic field(carder wave)modulated by a low frequency sine wave(...The parametric instability behavior of a liquid mercury sessile drop under high frequency Amplitude-Modulate Magnetic Field(AMMF),i.e.a high frequency magnetic field(carder wave)modulated by a low frequency sine wave(modulate wave),is investigated experimentally.The free surface contour of the mercury drop is observed by a CCD camera while varying the frequency and amplitude of the high frequency AMMF.At a given frequency and amplitude,the edge deformations with an azimuthal wave numbers(modes n=3,4,5,6)were excited.展开更多
基金the financial support from the Natural Science Foundation of Jiangsu University of Technologythe Provincial Key Project of Natural Science Research for Colleges and Universities of Anhui Province(KJ2014A062)
文摘Ethyl 3,9-dihydroxy-9-methyl-7-phenyl-7,8,10-trihydro-6H-dibenzo[b,d]pyran-6-one-8-carboxylate（C（23）H（22）O6,Mr = 394.42） has been synthesized and its structure was determined by ~1H and ^（13）C NMR,ESI-MS,elemental analysis,and X-ray single-crystal diffraction.The crystal belongs to the triclinic system,space group P1,with a = 8.8220（17）,b = 9.881（2）,c = 12.157（2） A,α= 90.488（3）,β= 102.664（4）,γ= 98.799（3）°,V= 1020.8（3） A^3,Z= 2,Dc = 1.342 g/cm^3,μ= 0.099mm^（-1）,F（000） = 436,R = 0.0615 and wR = 0.2501 for 2592 observed reflections with（I2σ（I））.In the crystal structure,the coumarin ring system is planar and the 3：4 fused cyclohexane ring adopts distorted half-chair conformation.Rich hydrogen bonding interactions are formed between compound 2 and lattice water molecules.These interactions assemble molecules of 2 into 2D layered networks in an AB stacking sequence.Its in vitro antiproliferative activities against three human cancer cell lines were evaluated by MTT assay.
基金Item Sponsored by National Natural Science Foundation of China (No.59874133) Creation Foundation of Shanghai Educational Committee (No.10YZ16)
文摘Due tothe important and common problems in optimizing material processing under reduced or micro gravity, bubble dynamic behaviors under thus gravity condition attract more and more attentions.For that purpose,a pair of Maxwell-Helmholtz(M-H)coils is developed to obtain a constant magnetic force acting on ferrofluids to neutralize gravity in a certain volume,which provides a uniform gradient magnetic field as well as a magnetic fieldintensity that is big enough to reach the magnetization saturation of ferrofluids.Afterwards,a finite-element-method based numerical simulation of the M-H coils shows a 20mm×30mm zone for 90%gravity compensation exists.An initial experimentshows that gas bubble is well controlled in a closed Hele-Shaw filled with ferrofluid with the help of magnetic gravity compensation.
基金Item Sponsored by National Natural Science Foundation of China (No.59874133) Creation Foundation of Shanghai Educational Committee (No.10YZ16)
文摘The parametric instability behavior of a liquid mercury sessile drop under high frequency Amplitude-Modulate Magnetic Field(AMMF),i.e.a high frequency magnetic field(carder wave)modulated by a low frequency sine wave(modulate wave),is investigated experimentally.The free surface contour of the mercury drop is observed by a CCD camera while varying the frequency and amplitude of the high frequency AMMF.At a given frequency and amplitude,the edge deformations with an azimuthal wave numbers(modes n=3,4,5,6)were excited.
